25132521 has 8 divisors (see below), whose sum is σ = 33657280. Its totient is φ = 16681392.

The previous prime is 25132517. The next prime is 25132529. The reversal of 25132521 is 12523152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25132521 - 2² = 25132517 is a prime.

It is a super-2 number, since 2×25132521² = 1263287223630882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25132529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17605 + ... + 18978.

It is an arithmetic number, because the mean of its divisors is an integer number (4207160).

Almost surely, 2^25132521 is an apocalyptic number.

It is an amenable number.

25132521 is a deficient number, since it is larger than the sum of its proper divisors (8524759).

25132521 is a wasteful number, since it uses less digits than its factorization.

25132521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36815.

The product of its digits is 600, while the sum is 21.

The square root of 25132521 is about 5013.2345845771. The cubic root of 25132521 is about 292.9175219321.

Adding to 25132521 its reverse (12523152), we get a palindrome (37655673).

The spelling of 25132521 in words is "twenty-five million, one hundred thirty-two thousand, five hundred twenty-one".